Definition of guarantor in English:

noun

His veterans were settled on confiscated land (especially in Campania and Etruria) as guarantors of his order.

The presentation of virtue or triumph rivaled rank in importance, for the great were also the guarantors of right order.

They still dreamed of a decentralized provincial order in which the privileges of the ancient estates would be cocooned, but now the monarchy was seen not as the enemy of that order but as its guarantor.